3721242643 has 2 divisors, whose sum is σ = 3721242644. Its totient is φ = 3721242642.

The previous prime is 3721242617. The next prime is 3721242647. The reversal of 3721242643 is 3462421273.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3721242643 - 2²¹ = 3719145491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3721242599 and 3721242608.

It is not a weakly prime, because it can be changed into another prime (3721242647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1860621321 + 1860621322.

It is an arithmetic number, because the mean of its divisors is an integer number (1860621322).

Almost surely, 2^3721242643 is an apocalyptic number.

3721242643 is a deficient number, since it is larger than the sum of its proper divisors (1).

3721242643 is an equidigital number, since it uses as much as digits as its factorization.

3721242643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 34.

The square root of 3721242643 is about 61001.9888446270. The cubic root of 3721242643 is about 1549.6346892122.

The spelling of 3721242643 in words is "three billion, seven hundred twenty-one million, two hundred forty-two thousand, six hundred forty-three".